package main

import (
	"fmt"
	"time"
)

func main() {
	var flag bool
	start := time.Now().Unix()
	for num:=1;num<=80000;num++{
		flag = true
		for i:=2;i<num;i++{
			if num % i==0 {
				flag = false
				break
			}
		}
	}
	if flag{
		
	}

	end := time.Now().Unix()
	fmt.Println("协程耗时=",end-start)
}